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Helmsy Helmsy is offline
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Join Date: May 2008
Location: South Australia
Posts: 281
I used to use Shell Helix Ultra too and have never had any issues with it.

I will check with my mechanic next time I speak with him and ask him what they used last service (recent service). I am looking to drain my engine whilst I do some upgrades so I too would like to know the best available oil (in AUS) for us turbocharged aircooled folk.

I would presume that if the oil wasn't flowing through the turbo and lines it might also cause coking. Seems odd that this has happend since you changed the turbo but it may just be a coincidence.

Best of luck and I will definately be checking thoroughly when I next drain my engine.
'85 930 - Black on Black
'95 993 Turbo - Silver
Old 02-22-2009, 01:04 AM
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